TEK2225 not focusing


2013-02-17 3:22 pm
Hello everybody,

I have a tek2225 scope and today I can not get the trace on the screen focused anymore :confused:. It appears that the pot has not enough range. Fully CCW is the best position, but still not focused.

I saw some post about adding (and changing) resistors around the pots HV part. Can anyone help me to get this problem tackled. For instance with the schematic of this part.

Thanks in advance,